First of all, along the top... see that line of words: home audio bits books ?
If not, your web browser doesn't understand Cascading Style Sheets (CSS). Time for an upgrade, perhaps?
Next. See how the word "help" is a different colour? That's because you're currently in my "help" pages. To return to my home page, just click on "home". I also use a "breadcrumb trail" to help you if you choose to go exploring. For example, the small text in the top left-hand corner shown here outlined in red...
...means you're currently two levels below my home page. Click on any "breadcrumb" to move directly to that level.
On the main top-level pages, clickable "buttons" drill down into the site. This example leads to my sitemap:
If all else fails... try a Google search: